2520553985 has 4 divisors (see below), whose sum is σ = 3024664788. Its totient is φ = 2016443184.

The previous prime is 2520553979. The next prime is 2520553993. The reversal of 2520553985 is 5893550252.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1529122816 + 991431169 = 39104^2 + 31487^2 .

It is a cyclic number.

It is not a de Polignac number, because 2520553985 - 2⁸ = 2520553729 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252055394 + ... + 252055403.

It is an arithmetic number, because the mean of its divisors is an integer number (756166197).

Almost surely, 2^2520553985 is an apocalyptic number.

It is an amenable number.

2520553985 is a deficient number, since it is larger than the sum of its proper divisors (504110803).

2520553985 is an equidigital number, since it uses as much as digits as its factorization.

2520553985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504110802.

The product of its (nonzero) digits is 540000, while the sum is 44.

The square root of 2520553985 is about 50205.1191115010. The cubic root of 2520553985 is about 1360.9181345344.

The spelling of 2520553985 in words is "two billion, five hundred twenty million, five hundred fifty-three thousand, nine hundred eighty-five".